Get rid of a lot of () for getters.

lib/html/src/OverflowEventWrappingImplementation.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class OverflowEventWrappingImplementation extends EventWrappingImplementation implements OverflowEvent {
   OverflowEventWrappingImplementation._wrap(ptr) : super._wrap(ptr);
 
   /** @domName OverflowEvent.initOverflowEvent */
   factory OverflowEventWrappingImplementation(int orient,
       bool horizontalOverflow, bool verticalOverflow) {
     final e = dom.document.createEvent("OverflowEvent");
     e.initOverflowEvent(orient, horizontalOverflow, verticalOverflow);
     return LevelDom.wrapOverflowEvent(e);
   }
 
-  bool get horizontalOverflow() => _ptr.horizontalOverflow;
+  bool get horizontalOverflow => _ptr.horizontalOverflow;
 
-  int get orient() => _ptr.orient;
+  int get orient => _ptr.orient;
 
-  bool get verticalOverflow() => _ptr.verticalOverflow;
+  bool get verticalOverflow => _ptr.verticalOverflow;
 }